TOPEX nut riveter for M3, M4, M5, M6, M8 nut rivets. Riveter can compress even nut rivets made of hard materials, such as steel and stainless steel, as well as aluminium nut rivets. It is equipped with 4 exchangeable heads. Nut rivets allow to join metal pieces and later disassemble the joint. TOPEX brand is oriented towards DIY enthusiasts.